Managing strain on a downhole cable

ABSTRACT

Techniques for managing strain on a downhole cable, such as a slickline or wireline, include a wire coupled with a communication line, such as a fiber optic cable or metallic (or non-metallic) conductor. In one example, a downhole cable includes a wire to support a downhole tool string; and a communication line non-linearly coupled with the wire, the communication line sized to communicate instructions, that include at least one of logic or data to the downhole tool, and elongate based on an axial force that acts on the downhole cable.

TECHNICAL BACKGROUND

This disclosure relates to managing strain on a downhole cable.

BACKGROUND

A downhole cable is often used to convey a downhole tool into awellbore. For example, a downhole cable can be a strong wire (e.g.,wireline, slickline, and/or other downhole cable) for withstanding thedynamic and static weight of the downhole tool. The weight includes thedynamic and static tension forces in the downhole cable when thedownhole tool accelerates or decelerates. The wire can also communicatetelemetric signals with the downhole tool. The dynamic weight of thedownhole tool can slightly stretch the downhole cable. Other factors canalso change the strain in the downhole cable.

DESCRIPTION OF DRAWINGS

FIG. 1 is a schematic cross-sectional side view of a well system with anexample downhole cable;

FIGS. 2A-2B illustrate cross-sectional views of example embodiments of adownhole cable that manages strain on components of the cable;

FIGS. 3A-3B illustrate cross-sectional views of example embodiments of adownhole cable that manages strain on components of the cable; and

FIG. 4 illustrates an example method performed with a downhole cable.

DETAILED DESCRIPTION

The present disclosure relates to managing strain on a downhole cable,such as a slickline or wireline, that includes a wire coupled with acommunication line, such as a fiber optic cable or metallic (ornon-metallic) conductor. In a general implementation, a downhole cableincludes a wire to support a downhole tool string; and a communicationline non-linearly coupled with the wire, the communication line sized tocommunicate instructions, that include at least one of logic or data tothe downhole tool, and to elongate based on an axial force that acts onthe downhole cable.

In a first aspect combinable with the general implementation, thecommunication line includes at least one of a fiber optic line or ametallic conductor.

In a second aspect combinable with any of the previous aspects, the wireincludes a composite material.

In a third aspect combinable with any of the previous aspects, thecommunication line is non-linearly embedded in a matrix of the compositematerial.

In a fourth aspect combinable with any of the previous aspects, thecommunication line is non-linearly embedded in the matrix of thecomposite material in a helical or zig-zag path.

In a fifth aspect combinable with any of the previous aspects, the wireincludes a flexible rod, and the communication line is non-linearlywrapped around the flexible rod.

A sixth aspect combinable with any of the previous aspects furtherincludes a coating that at least partially covers the communication lineand the flexible rod.

In a seventh aspect combinable with any of the previous aspects, thecoating includes polyether ether ketone.

In an eighth aspect combinable with any of the previous aspects, for aparticular portion of the downhole cable, a length of the communicationline that extends between ends of the particular portion is greater thana length of the wire that extends between the ends of the particularportion.

In a ninth aspect combinable with any of the previous aspects, a valuethat defines an allowable strain of the wire is greater than a valuethat defines an allowable strain of the communication line.

In a tenth aspect combinable with any of the previous aspects, adiameter of the downhole cable is about 0.138 inches.

In an eleventh aspect combinable with any of the previous aspects, thecomposite material includes polyphenylene sulfide.

In a twelfth aspect combinable with any of the previous aspects, thedownhole cable includes a slickline, and the wire includes a singlesolid wire.

In a thirteenth aspect combinable with any of the previous aspects, thedownhole cable includes a wireline, and the wire includes a braidedwire.

Another general implementation includes a method of managing strain on adownhole cable that includes running a downhole tool coupled to adownhole cable into a wellbore, the downhole cable including a wire anda communication line non-linearly coupled with the wire; operating thedownhole tool in the wellbore by transmitting, on the communicationline, instructions that include at least one of logic or data betweenthe downhole tool and a terranean surface; receiving a force in an axialdirection on the downhole cable; and in response to the received force,elongating the communication line from a substantially non-linearposition toward a substantially linear position.

In a first aspect combinable with the general implementation, thecommunication line includes at least one of a fiber optic line or ametallic conductor.

In a second aspect combinable with any of the previous aspects, thecommunication line is non-linearly embedded in a matrix of a compositematerial.

In a third aspect combinable with any of the previous aspects,elongating the communication line from a non-linear position toward alinear position includes elongating the communication line from ahelical or zig-zag position toward the substantially linear position.

A fourth aspect combinable with any of the previous aspects furtherincludes receiving a second force in the axial direction on the downholecable that is less than the received force; and in response to thesecond force, shortening the communication line toward the substantiallynon-linear position.

In a fifth aspect combinable with any of the previous aspects, the wireincludes a flexible rod, and the communication line is non-linearlywrapped around the flexible rod.

In a sixth aspect combinable with any of the previous aspects, thedownhole cable further includes a coating that at least partially coversthe communication line and the flexible rod.

In a seventh aspect combinable with any of the previous aspects, for aparticular portion of the downhole cable, a length of the communicationline that extends between ends of the particular portion is greater thana length of the wire that extends between the ends of the particularportion.

In an eighth aspect combinable with any of the previous aspects, thelogic or data includes values associated with telemetry data.

Another general implementation includes a downhole conductor thatincludes a wire that extends a first length between a first end of thedownhole conductor and a second end of the downhole conductor, the wiresized to support a downhole tool string in a wellbore; and a dataconductor to transmit at least one of logic or data with the downholetool string and coupled with the wire, the data conductor extending asecond length between the first end of the downhole conductor and thesecond end of the downhole conductor, the second length greater than thefirst length.

In a first aspect combinable with the general implementation, the dataconductor is embedded in a helical path through a composite material ofthe wire.

In a second aspect combinable with any of the previous aspects, thecomposite material includes a single homogenous tension member, and thedata conductor is wound in a helical path around the member.

A third aspect combinable with any of the previous aspects furtherincludes a protective coating wrapped around the data conductor and thetension member.

In a fourth aspect combinable with any of the previous aspects, the dataconductor includes an optical fiber.

In a fifth aspect combinable with any of the previous aspects, each ofthe wire and the data conductor include respective distal ends that arecoterminous with the first end of the downhole conductor and respectiveproximal ends that are coterminous with the second end of the downholeconductor.

In a sixth aspect combinable with any of the previous aspects, thedownhole conductor includes a slickline, and the wire includes a singlehomogeneous wire, and the data conductor includes a fiber opticconductor.

Various implementations of a downhole cable (e.g., downhole carrier,downhole conveyance, or downhole cable) in accordance with the presentdisclosure may include one, some, or all of the following features. Forexample, the communication line may be non-linearly embedded in adownhole cable in a spiral, helical, zig-zag, or sinusoidal path. Thecommunication line can include a fiber optic line and conductor lines,and the communication line can be enclosed in a single line or betwisted using multiple lines. In some implementations, the communicationline may be non-linearly wrapped around the composite material includinga flexible rod. The non-linear integration of the communication line,either embedded internally or wrapped externally, can relieve excessivestrain from the communication line when the composite material extendsdue to static and dynamic tensile loads, as well as torsional loadsand/or temperature variations. Further, in some implementations, adownhole cable according to the present disclosure may decrease linearand torsional strain in the static and dynamic loading of the cable.

FIG. 1 is a schematic cross-sectional side view of a well system 100with an example downhole cable 110. The well system 100 is provided forconvenience of reference only, and it should be appreciated that theconcepts herein are applicable to a number of different configurationsof well systems. The well system 100 includes a wellbore 108 thatextends from a terranean surface 105 through one or more subterraneanzones of interest 101. In FIG. 1, the wellbore 108 initially extendsvertically and transitions horizontally. In other instances, thewellbore 108 can be of another position, for example, deviates tohorizontal in the subterranean zone 101, entirely substantially verticalor slanted, it can deviate in another manner than horizontal, it can bea multi-lateral, and/or it can be of another position.

At least a portion of the illustrated wellbore 108 may be lined with acasing 106, constructed of one or more lengths of tubing, that extendsfrom the terranean surface 105, downhole, toward the bottom of thewellbore 108. The casing 106 provides radial support to the wellbore 108and seals against unwanted communication of fluids between the wellbore108 and surrounding formations. Here, the casing 106 ceases at or nearthe subterranean zone 101 and the remainder of the wellbore 108 is anopen hole, e.g., uncased. In other instances, the casing 106 can extendto the bottom of the wellbore 108 or can be provided in another positionand in multiple circumferences or thicknesses (e.g., conductor casing orotherwise).

As illustrated, a downhole tool string 120 is coupled to (e.g.,supported by) the downhole cable 110, which can be, for example, awireline, a slickline, an electric line. In the illustrated embodiment,the downhole cable 110 can support a downhole tool string (e.g., one ormore downhole tools). In this example, the downhole cable 110 includes abraided (e.g., multiple bound, or intertwined, wires such as wireline orelectric line) or solid wire (e.g., a single wire such as slickline) anda communication line. The communication line is coupled with the braidedor solid wire such as, for example, embedded in, intertwined with one ormore wires, or wrapped around or within one or more wires, in anon-linear (e.g., undulating, helical, zig-zag, or otherwise)configuration.

In the illustrated example, the communication line may have a differentYoung's modulus than a Young's modulus of the braided or solid wire. Insuch cases, a maximum strain that the communication line may tolerate(e.g., before failure) may be different than a maximum strain that thebraided or solid wire can tolerate (e.g., before failure). In someaspects, for instance, the braided or solid wire may tolerate a higher(e.g., substantially) maximum strain before failure as compared to thecommunication line.

In some aspects, a particular length (e.g., between two terminatingends) of the downhole cable 110 includes a length of the braided orsolid wire and a length of the communication line. In the particularlength of the downhole cable 110, the respective lengths of the braidedor solid wire and the communication line may also terminate at or closeto the terminating ends of the downhole cable 110. In some aspects, thelength of the communication line may be greater than (e.g., slightly orsubstantially) the length of the braided or solid wire because of, forexample, the non-linear configuration in which the communication line iscoupled with the braided or solid wire.

In one example embodiment (as described more fully with respect to FIGS.2A-2B and 3A-3B), the downhole cable 110 is a slickline that includes asolid wire and a communication line. The slickline supports tool string120 and can communicate instructions, data, and/or logic between thetool string 120 and the terranean surface 105 though the communicationline (e.g., optical fiber, metallic conductor, or non-metallicconductor). The communication line of the slickline is non-linearlycoupled with the solid wire such that strain that exceeds a maximumallowable strain of the communication line, but not a maximum allowablestrain of the solid wire, does not cause failure of the communicationline or the slickline.

In some implementations, the downhole tool string 120 may communicatewith computing systems or other equipment at the surface 105 using thecommunication capabilities of the downhole cable 110. For example, thedownhole tool string 120 may send and receive electrical signals and/oroptical signals (e.g., data and/or logic) through respective conductorwire and/or fiber optics of the communication line within the downholecable 110. In addition, the downhole tool string 120 may be lowered orraised relative to the wellbore 108 by respectively extending orretrieving the downhole cable 110.

During operation, variable tension loading is applied to the downholecable 110 when the downhole cable 110 lowers or raises the downhole toolstring 120. The tension loading is related to the mass, acceleration,and deceleration of the downhole tool string 120. The tension loadingcan extend the downhole cable 110 axially. The amount of extension isrelated to the magnitude of the tension loading, the stiffness (e.g.,Young's modulus) of the downhole cable 110, and parameters (e.g.,diameter) of the downhole cable 110. Because the downhole cable 110 isplaced downhole where temperature varies, the downhole cable 110 mayalso experience thermal expansion or contraction. The thermal expansionor contraction can also contribute to the amount of extension of thedownhole cable 110.

When the downhole cable 110 includes two or more different materials,the extension due to tensile loading and thermal effect can be differentin the two or more materials. For example, the braided or solid wire ofthe downhole cable 110 can comprise a composite material, while thecommunication line can comprise a conductive or fiber optic material (orother data conductor). The braided or solid wire of the cable 110 andthe communication line may have different extension limits (e.g.,maximum allowable strains without structural damage) and differentchanges in length when experiencing the same temperature changes (e.g.,different coefficient of thermal expansion). Strain values can employdifferent definitions, for example, engineering strain is the ratiobetween the total deformation to the original length, e.g., the amountof deformation of unit length.

The different extension limits can impose limitations to the downholecable 110 if the braided or solid wire and the communication line wereintegrated linearly (e.g., combined in a one-to-one length ratio). Forexample, as described, the braided or solid wire can have a higherallowable strain level than the communication line (e.g., made ofoptical fibers). This can result in a lower tension load rating for thebraided or solid wire to prevent failure of the communication line. Insome aspects of the present disclosure, failure such as that describedabove may be presented through the non-linear coupling method to combinethe braided or solid wire with the communication line. In someimplementations, the diameter of the downhole cable 110 is about 0.138inches.

FIGS. 2A-2B illustrate an example embodiment of a downhole cable 200that manages strain on components of the cable 200. In some aspects, thecable 200 can be used as or in place of the cable 110 described inFIG. 1. FIG. 2A is a cross sectional side view of a portion of thedownhole cable 110. FIG. 2B is a cross sectional top view of thedownhole cable 200. Generally, as with the downhole cable 110, thedownhole cable 200 can support a downhole tool string (e.g., one or moredownhole tools). The downhole cable 200 includes a braided wire (e.g.,multiple bound, or intertwined, wires such as wireline or electric line)or solid wire (e.g., a single wire such as slickline) and acommunication line. The communication line is coupled with the braidedor solid wire such as, for example, embedded in, intertwined with one ormore wires, or wrapped around or within one or more wires, in anon-linear (e.g., undulating, helical, zig-zag, or otherwise)configuration.

In one example of the downhole cable 200, as shown in FIG. 2A, thedownhole cable 200 is a slickline that includes a wire 210. The wire 210can be formed from a metallic or non-metallic material, such as acomposite material (e.g., polyphenylene sulfide or other organicpolymer, high-performance thermoplastic, or otherwise). The wire 210 isconfigured to couple to and support a downhole tool string, such as thedownhole tool string 120 of FIG. 1. The downhole cable 200 furtherincludes a communication line 220 that is non-linearly coupled with thewire 210. The communication line 220 can be sized to communicateinstructions that include logic and/or data to the downhole tool. Thecommunication line 220 can be configured to elongate based on an axialforce acting on the cable 200 that relate, for example, to the mass,acceleration, and/or the deceleration of the downhole tool.

In some implementations, the communication line 220 includes at leastone of a fiber optic cable or a metallic conductor wire. For example,when communication and/or telemetry with the downhole tool use opticalsignals, the communication line 220 includes one or more fiber opticcables. When communication and/or telemetry with the downhole tool useelectrical signals, the communication line 220 includes one or moremetallic conductor wires.

The communication line 220, in the illustrated example, is non-linearlyembedded in a matrix of the composite material of the wire 210. Forexample, the composite material may include metallic alloys, polymers,composites, and/or other materials. In manufacture, the communicationline 220 can be continuously fed into the forming of the wire 210, whichmay be extruded or rolled or otherwise formed. The communication line220 can be non-linearly embedded in the matrix of the composite materialin a helical (or spiral), zig-zag, sinusoidal, or other non-linear path.A helical path may be defined with a constant pitch and radius. A spiralpath may be defined with a variable pitch and/or a variable radius. Azig-zag or sinusoidal path may be planar or three-dimensional. Othernon-linear path benefiting manufacture or strain management may also beused. As illustrated in FIG. 2A, the communication line 220 is embeddedin the wire 210 in a helical path. In FIG. 2B, the helical path isfurther depicted with a constant or near constant radius.

FIGS. 3A-3B illustrate example embodiments of a downhole cable 300 thatmanages strain on components of the conduit. In some aspects, the cable300 can be used as or in place of the cable 110 described in FIG. 1.FIG. 3A is a side view of a portion of the downhole cable 300. FIG. 3Bis a compressed cross sectional top view of the downhole cable 300.Generally, as with the downhole cables 110 and 200, the downhole cable300 can support a downhole tool string (e.g., one or more downholetools). The downhole cable 300 includes a braided wire (e.g., multiplebound, or intertwined, wires such as wireline or electric line) or solidwire (e.g., a single wire such as slickline) and a communication line.The communication line is coupled with the braided or solid wire suchas, for example, embedded in, intertwined with one or more wires, orwrapped around or within one or more wires, in a non-linear (e.g.,undulating, helical, zig-zag, or otherwise) configuration.

Similar to the embodiment disclosed in FIG. 2A, in FIG. 3A, the downholecable 300 may be coupled with a downhole tool string. The downhole cable300, in this example implementation, may be a slickline that includes awire 310, a communication line 320, and a coating 315. The communicationline 320 can be respectively similar to the communication line 220 asdiscussed in FIGS. 2A-2B. In this example, the wire 210 includes (e.g.,is made of) a composite material that forms a flexible rod. Thecommunication line 320 can non-linearly wrap around the flexible rod,such as in a helical manner. In FIG. 3B, the coating 315 can at leastpartially cover the communication line 320 and the flexible rod and canprotect the communication line 320 from damage and/or contamination. Thecoating 315 may be made of various thermoset, thermoplastic, or otherpolymer materials. In some implementations, the coating 315 includespolyether ether ketone.

In both configuration embodiments illustrated in FIGS. 2A and 3A, for aparticular portion of the downhole cables 200 and/or 300, the length ofthe communication line 220 or 320 that extends between ends (orgenerally, two points) of the particular portion can be greater than thelength of the wire 210 or 310 (respectively) that extends between theends (or the two points) of the particular portion. For example, thehelical configuration of the communication line 220 or 320 can bestraightened during extension without incurring substantial tensilestrain. The communication line 220 or 320 may respectively be allowed tomove relative to the composite materials of the wire 210 or 310 duringextension.

FIG. 4 illustrates an example method performed with a downhole cable. At402, a downhole tool is run into a wellbore from a terranean. Thedownhole tool is coupled with the conduit. The downhole cable includes aslickline that includes a composite material, and a communication linenon-linearly coupled with the composite material. The communication linecan be used to communicate control or data information between thedownhole tool and computing systems at the terranean surface. Forexample, the communication line can include at least one of a fiberoptic line, or a metallic conductor.

In some implementations, the communication line is non-linearly embeddedin a matrix of the composite material, such as in a helical, spiral,zig-zag, sinusoidal, or other similar non-linear manner. In someimplementations, the downhole cable can include composite material thatincludes a flexible rod; and the communication line is non-linearlywrapped around the flexible rod. The downhole cable can further includea coating that partially covers the communication line and the flexiblerod.

At 404, data signals are transmitted on the communication line withinthe downhole cable. For example, the data signals can include logic ordata between the downhole tool and the terranean surface. The logic ordata can include values associated with telemetry data. In someimplementations, the data signals can be optical signals sent fromoptical sensors of the downhole tool. In some implementations, the datasignals can be electrical signals sent from electronic devices andsensors. The data signals can also include control signals sent from theterranean surface. Close loop control may also be implemented using thecommunication line.

At 406, the downhole tool can be operated corresponding to the datasignals. For example, the downhole tool can perform certain functionsbased on a control instruction sent from the terranean surface. Theoperation of the downhole tool may increase or decrease the tensionapplied to the downhole cable.

At 408, a force is received on the downhole cable. The force is relatedto the tension in the downhole cable. The force may have been receivedat the very beginning of the operation. Discussing the force in thisstep does not indicate its occurrence in timing or order. The force canbe a dynamic tensile load related to the mass of the downhole tool andits acceleration/deceleration.

At 409, in response to the received force, the communication line iselongated from a substantially non-linear position toward asubstantially linear position. For example, the elongation may includeextending the communication line from a helical, zig-zag, sinusoidal, orspiral position toward the substantially linear position. Thesubstantially non-linear position can be the original unloaded positionof the communication line with respect to the slickline. Thesubstantially linear position can be the fully extended position in linewith the slickline. For a particular portion of the downhole cable, alength of the communication line that extends between ends of theparticular portion can be greater than a length of the slickline thatextends between the ends of the particular portion.

In some implementations, a second force less than the received force isreceived (e.g., during deceleration). In response to the second force,the communication line is shortened from the substantially linearposition toward the substantially non-linear position.

A number of examples have been described. Nevertheless, it will beunderstood that various modifications may be made. For example, eventhough the illustrations in FIGS. 2A and 3A use respective helicalembedment and helical wrapping configurations with the slicklinecomposite materials, other configurations are possible, such as zig-zag,spiral, sinusoidal, among others. The composite material may includesubstance(s) other than polyphenylene sulfide or include a differentmaterial. In the embodiment of FIG. 3A, the coating 315 may also includesubstance(s) other than polyether ether ketone, or include a differentmaterial. Accordingly, other examples are within the scope of thefollowing claims.

1. A downhole cable, comprising: a wire to support a downhole toolstring; and a communication line non-linearly coupled with the wire, thecommunication line sized to communicate instructions, that comprise atleast one of logic or data to the downhole tool, and elongate based onan axial force that acts on the downhole cable.
 2. The downhole cable ofclaim 1, wherein the communication line comprises at least one of afiber optic line or a metallic conductor.
 3. The downhole cable of claim1, wherein the wire comprises a composite material.
 4. The downholecable of claim 3, wherein the communication line is non-linearlyembedded in a matrix of the composite material.
 5. The downhole cable ofclaim 4, wherein the communication line is non-linearly embedded in thematrix of the composite material in a helical or zig-zag path.
 6. Thedownhole cable of claim 1, wherein the wire comprises a flexible rod,and the communication line is non-linearly wrapped around the flexiblerod.
 7. The downhole cable of claim 6, further comprising a coating thatat least partially covers the communication line and the flexible rod.8. The downhole cable of claim 7, wherein the coating comprisespolyether ether ketone.
 9. The downhole cable of claim 1, wherein for aparticular portion of the downhole cable, a length of the communicationline that extends between ends of the particular portion is greater thana length of the wire that extends between the ends of the particularportion.
 10. The downhole cable of claim 1, wherein a value that definesan allowable strain of the wire is greater than a value that defines anallowable strain of the communication line.
 11. The downhole cable ofclaim 1, wherein a diameter of the downhole cable is about 0.138 inches.12. The downhole cable of claim 1, wherein the wire comprisespolyphenylene sulfide.
 13. The downhole cable of claim 1, wherein thedownhole cable comprises a slickline, and the wire is a monofilamentwire.
 14. The downhole cable of claim 1, wherein the downhole cablecomprises a wireline, and the wire comprises a braided wire.
 15. Amethod of managing strain on a downhole cable, comprising: running adownhole tool coupled to a downhole cable into a wellbore, the downholecable comprising a wire and a communication line non-linearly coupledwith the wire; operating the downhole tool in the wellbore bytransmitting, on the communication line, instructions that comprise atleast one of logic or data between the downhole tool and a terraneansurface; receiving a force in an axial direction on the downhole cable;and in response to the received force, elongating the communication linefrom a substantially non-linear position toward a substantially linearposition.
 16. The method of claim 15, wherein the communication linecomprises at least one of a fiber optic line or a metallic conductor.17. The method of claim 15, wherein the communication line isnon-linearly embedded in a matrix of a composite material.
 18. Themethod of claim 17, wherein elongating the communication line from anon-linear position toward a linear position comprises elongating thecommunication line from a helical or zig-zag position toward thesubstantially linear position.
 19. The method of claim 15, furthercomprising: receiving a second force in the axial direction on thedownhole cable that is less than the received force; and in response tothe second force, shortening the communication line toward thesubstantially non-linear position.
 20. The method of claim 15, whereinthe wire comprises a flexible rod, and the communication line isnon-linearly wrapped around the flexible rod.
 21. The method of claim20, wherein the downhole cable further comprises a coating that at leastpartially covers the communication line and the flexible rod.
 22. Themethod of claim 15, wherein for a particular portion of the downholecable, a length of the communication line that extends between ends ofthe particular portion is greater than a length of the wire that extendsbetween the ends of the particular portion.
 23. The method claim 15,wherein the logic or data comprises values associated with telemetrydata.
 24. A downhole conductor, comprising: a wire that extends a firstlength between a first end of the downhole conductor and a second end ofthe downhole conductor, the wire sized to support a downhole tool stringin a wellbore; and a data conductor to transmit at least one of logic ordata with the downhole tool string and coupled with the wire, the dataconductor extending a second length between the first end of thedownhole conductor and the second end of the downhole conductor, thesecond length greater than the first length.
 25. The downhole conductorof claim 24, wherein the data conductor is embedded in a helical paththrough a composite material of the wire.
 26. The downhole conductor ofclaim 25, wherein the composite material comprises a single homogenoustension member, and the data conductor is wound in a helical path aroundthe member.
 27. The downhole conductor of claim 26, further comprising aprotective coating wrapped around the data conductor and the tensionmember.
 28. The downhole conductor of any one of claims claim 24,wherein the data conductor comprises an optical fiber.
 29. The downholeconductor of claim 24, wherein each of the wire and the data conductorcomprise respective distal ends that are coterminous with the first endof the downhole conductor and respective proximal ends that arecoterminous with the second end of the downhole conductor.
 30. Thedownhole conductor of claim 24, wherein the downhole conductor comprisesa slickline, and the wire comprises a single homogeneous wire, and thedata conductor comprises a fiber optic conductor.